Purpose The aims of the study were 1) to compare two phases of dual-phase cone beam computed tomography (DP-CBCT) achieved before and after Yttrium-90 (90Y) administration and to evaluate additional benefits during radioembolisation (RE) procedures; and 2) to compare DP-CBCT with pre-procedure contrast enhanced cross-sectional images in terms of tumour detection. Material and methods Twenty-three hepatocellular carcinoma patients undergoing RE treatment were scanned with DP-CBCT consisting of early arterial (EA) and late arterial (LA) phases before and after 90Y administration. The CT-like datasets were compared according to embolisation effect, enhancement patterns, lesion detectability, image quality, and artifacts by two interventional radiologists blinded to each other. The compatibility of the two radiologists was evaluated with kappa statistical analysis, and the difference between EA and LA phases was evaluated with marginal homogeneity test. Also, DP-CBCT images were compared with preprocedural cross-sectional images (CT/MRI). Results For 23 patients 92 data were acquired. Thirteen patients showed a decrease on post-embolisation images both visually and on Hounsfield unit (HU) measurements. No statistical difference was found for tumour detection between EA and LA phases (p = 1.0). Tumour enhancement was visually superior at LA phases whereas EA phases were better for arterial mapping for selective catheterisation. DP-CBCT images were not inferior to preprocedural cross-sectional imaging findings. Conclusions DP-CBCT is a promising tool for predicting tumour response to therapy and is not inferior to preprocedural cross-sectional imaging in terms of tumour detection. It allows better assessment during RE procedures because early phases provide good mapping for superselective catheterisation whereas late phases are better for visualisation of tumour enhancement. Copyright © Polish Medical Society of Radiology 2020.Purpose To evaluate the ability and the utility of diffusion-weighted magnetic resonance imaging (MRI) with different 'b' values to visualise benign and malignant lung lesions, and to determine which 'b' value (b = 300, 500, or 1000 s/mm2) was most useful in differentiating benign from malignant lung lesions. Material and methods A total of 100 patients (28 women, 72 men; mean age = 57.19 ± 13.44 years; age range = 20-83 years). https://www.selleckchem.com/ Diffusion-weighted imaging (DWI) was obtained with 'b' values of 300, 500, and 1000 s/mm2. The signal intensity of lesions on DWI images was analysed, and the apparent diffusion coefficient (ADC) values of the lesions were calculated. MRI was performed in all patients after having presented at our department for thoracic computed tomography for various reasons. Results A statistically significant difference in DWI signal scores was detected between benign and malignant lesions for all 'b' factors (p less then 0.0001 for each). The sensitivity and specificity were 95% and 64%, respectively, when a score of 3 for β = 300 s/mm2; 90% and 69%, respectively, when a score of 3 for β = 500 s/mm2; and 84% and 74%, respectively, when a score of 3 for β = 1000 s/mm2. ADC values showed significant differences between benign and malignant lesions for all 'b' factors (p less then 0.0001 for each). Conclusions Using 'b' values of 300, 500, and 1000 s/mm2, DWI signal intensity scores and ADC values are effective methods for the differential diagnosis of malignant and benign pulmonary lesions. Copyright © Polish Medical Society of Radiology 2020.Purpose To determine the frequency of rotator cuff tear on the shoulder magnetic resonance imaging (MRI) of patients with rotator cuff calcific tendinopathy and the relationship between rotator cuff tear and calcific tendinopathy. Material and methods In this retrospective case control study, 137 patients with calcific tendinopathy and 137 control group patients without calcific tendinopathy with shoulder pain, whose age, sex, and shoulder laterality values were matched, were compared in terms of rotator cuff tears on their shoulder MRI images. Results The frequency of rotator cuff tear was found to be significantly higher in the control group (37.2%) compared to the calcific tendinopathy group (23.4%) (p 0.05, r = 0.04). Conclusions The patients with calcific tendinopathy, who had been admitted with shoulder pain, did not demonstrate an increased risk of rotator cuff tear based on their MRI compared to patients with shoulder pain without calcific tendinopathy. No significant relationship was determined between calcific tendinopathy and rotator cuff tear. Copyright © Polish Medical Society of Radiology 2020.Purpose To evaluate the significance of additional coronal reconstruction images in the diagnostic ability of contrast-enhanced computed tomography (CECT) for metastatic cervical nodes in patients with head and neck squamous cell carcinomas (HNSCC). Material and methods We retrospectively assessed 97 metastatic and 141 reactive histologically proven cervical nodes of 38 patients with HNSCC, who underwent CECT before neck dissection. Observer #1, an expert radiologist in head and neck imaging, and observer #2, a general radiologist, reviewed all CECT images. The observers first assessed the presence of nodal metastasis using axial CECT alone (A-CECT). Three days later, they reassessed its presence using combined axial and coronal CECT (A&amp;C-CECT). Results The sensitivity of A-CECT vs. A&amp;C-CECT was 73.2% vs. 75.3% for observer #1 (p = 0.73) and 69.1% vs. 69.1% for observer #2 (p = 1.00), respectively. The specificity of A-CECT versus A&amp;C-CECT was 92.2% vs. 97.2% for observer #1 (p less then 0.05) and 92.9% vs. 95.7% for observer #2 (p = 0.22), respectively. The accuracy of A-CECT versus A&amp;C-CECT was 84.5% vs. 88.2% for observer #1 (p less then 0.05) and 83.2% vs. 85.3% for observer #2 (p = 0.30), respectively. The area under the curve (AUC) of A-CECT vs. A&amp;C-CECT was 0.86 vs. 0.91 for observer #1 (p less then 0.05) and 0.85 vs. 0.85 for observer #2 (p = 0.80), respectively. Conclusions The specificity, accuracy, and AUC increased with the use of coronal images during the assessment by the expert radiologist. The appropriate use of coronal images allowed proper configuration recognition and improved diagnostic ability. Copyright © Polish Medical Society of Radiology 2020.